<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
		<style>
			#a{opacity: 0.1;}
			a{font-size: 30px;font-family: "黑体";}
			body{font-size: 40px;}
			a,.b,#a{}
			
		</style>
	</head>
	<body>
		<p id="a">p1</p>
		<p class="b">p2</p>
		
		<a href="#" class="b" >大吉大利a1</a>
		<a href="#" class="b" >a2</a>
		
		姓名：<input type="text" />
		年龄：<input type="number" />
	</body>
</html>
